Fig. 4From: Effects of acetazolamide combined with remote ischemic preconditioning on risk of acute mountain sickness: a randomized clinical trialChange of SpO2 in different groups during the 6 h of hypoxic exposure. After hypoxic exposure, SpO2 reached its minimum at 1-h hypoxia. At 6-h hypoxia, Acetazolamide and Combined group showed significantly higher SpO2 than the other groups. Data are mean with SD. *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001 vs. Control groupBack to article page